CVE-2026-34855 | BDVDB-2026-326676 Detail

HuaweiHarmonyOS

Description#

Out-of-bounds write vulnerability in the kernel module. Impact: Successful exploitation of this vulnerability will affect availability and confidentiality.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact none, availability impact high. Attack vector: local.

Weaknesses#

CWE-20 Improper Input Validation

References#

https://consumer.huawei.com/en/support/bulletin/2026/4/

Exploit#

No public exploit known

History#

Version 12026-04-13Record published in the CVE List.

Published

Published: 2026-04-13
Last modified: 2026-04-13

Vendor information

Vendor: Huawei
Product: HarmonyOS

All Huawei vulnerabilities

Score

5.7 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 1.4.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Improper Input Validation

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
6.0.0
Fixed
Not stated
Vulnerable
5.1.0
Fixed
Not stated
Vulnerable
4.3.1
Fixed
Not stated
Vulnerable
4.3.0
Fixed
Not stated
Vulnerable
4.2.0
Fixed
Not stated
Vulnerable
4.0.0
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

5.7 Medium

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H

Metric breakdown
Attack Vector	Local
Attack Complexity	High
Privileges Required	High
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	None
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).